Fix build issues on macos

chroma-previewer.spec

@@ -0,0 +1,52 @@
+# -*- mode: python ; coding: utf-8 -*-
+import sys
+from PyInstaller.utils.hooks import collect_submodules
+
+# Project name and entry script
+app_name = "ChromaPreviewer"
+entry_script = "main.py"
+
+# Gather hidden imports for PyQt6 and OpenCV
+hidden_imports = collect_submodules("cv2") + collect_submodules("PyQt6")
+
+a = Analysis(
+    [entry_script],
+    pathex=["."],  # Current directory
+    binaries=[],
+    datas=[],
+    hiddenimports=hidden_imports,
+    hookspath=[],
+    runtime_hooks=[],
+    excludes=[],
+    win_no_prefer_redirects=False,
+    win_private_assemblies=False,
+    cipher=None,
+    noarchive=False,
+)
+
+pyz = PYZ(a.pure, a.zipped_data, cipher=None)
+
+exe = EXE(
+    pyz,
+    a.scripts,
+    a.binaries,
+    a.zipfiles,
+    a.datas,
+    [],
+    name=app_name,
+    debug=False,
+    bootloader_ignore_signals=False,
+    strip=False,
+    upx=True,
+    console=False
+)
+
+app = BUNDLE(
+    exe,
+    name=app_name + ".app",
+    bundle_identifier="com.1060studios.chromapreviewer",
+    info_plist={
+        "NSCameraUsageDescription": "This app requires access to the camera for live chroma keying."
+    },
+    entitlements="entitlements.plist"
+)

entitlements.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>com.apple.security.device.camera</key>
+    <true/>
+</dict>
+</plist>

main.py

@@ -93,8 +93,11 @@ class ChromaPreviewer(QWidget):
         ], dtype=np.uint8)
 
     def update_frame(self):
-        ret, frame = self.cap.read()
+        try:
-        if not ret:
+            ret, frame = self.cap.read()
+            if not ret:
+                return
+        except AttributeError:
             return
 
         frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)